Odd electrical gremlin. no start, dim dome light (some times) buzzer comes on and off

So... I got it running.

You ready for this 67?...

I, uh. Well... I cleaned the terminals and clamps.

.

Well I tell ya, in my "yuth" I was tricked by this "a couple of" times. Once was when I bought a brand new battery. I cleaned the CLAMPS but not the battery posts. Hell they looked GREAT.

Put the battery in and would not crank. Didn't take long to figure out, but I still remember that.